Global Radiative Impacts of Black Carbon Acting as Ice Nucleating Particles.
aerosol indirect effects
black carbon
cirrus
climate
climate modeling
Journal
Geophysical research letters
ISSN: 0094-8276
Titre abrégé: Geophys Res Lett
Pays: United States
ID NLM: 9882887
Informations de publication
Date de publication:
28 Oct 2020
28 Oct 2020
Historique:
received:
28
05
2020
revised:
25
09
2020
accepted:
29
09
2020
entrez:
31
12
2020
pubmed:
1
1
2021
medline:
1
1
2021
Statut:
ppublish
Résumé
Black carbon (BC) aerosols from incomplete combustion generally warm the climate, but the magnitudes of their various interactions with climate are still uncertain. A key knowledge gap is their role as ice nucleating particles (INPs), enabling ice formation in clouds. Here we assess the global radiative impacts of BC acting as INPs, using simulations with the Community Earth System Model 2 climate model updated to include new laboratory-based ice nucleation parameterizations. Overall, we find a moderate cooling through changes to stratiform cirrus clouds, counteracting the well-known net warming from BC's direct scattering and absorption of radiation. Our best estimates indicate that BC INPs generally thin cirrus by indirectly inhibiting the freezing of solution aerosol, with a global net radiative impact of -0.13 ± 0.07 W/m
Identifiants
pubmed: 33380757
doi: 10.1029/2020GL089056
pii: GRL61321
pmc: PMC7757207
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e2020GL089056Informations de copyright
©2020. The Authors.
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